In China, what is the difference between solar off-grid power generation and grid-connected power generation

Photovoltaic off-grid power generation is a battery of solar power generation system, solar panels are made by the electricity is stored by the controller to the battery, then through controller and inverter to the load power supply. Photovoltaic off-grid power generation is not connected to the grid, which can be off-grid

solar off-grid power generation is a kind of solar power generation system with accumulator. Solar panels generate electricity is stored in the storage battery by the controller, and then through controller and inverter to the load power supply. Photovoltaic off-grid power generation is not connected to the grid, can run independently of the power grid, so also known as solar power. For example, our common solar street light is a typical application of photovoltaic off-grid power generation demonstration. Photovoltaic (pv) grid power generation by solar photovoltaic inverter dc convert and public power grid frequency and phase of pure sine wave alternating current (ac), through the booster or low voltage side access to public power grid scheduling using electricity. Solar capacity of independent power systems but can small, configuration scheme can be adjusted at any time, won't because size is too large and waste of investment. In electricity power supply unstable place, weak infrastructure, solar off-grid power generation system can realize complementary function with grid. The fields, farmers and photovoltaic off-grid power generation can be used in the remote and border areas not power of small-scale planting points, to meet user demand for simple everyday lighting and household electrical appliances. Grid off-grid power generation principle is the use of photovoltaic modules ( Solar panels) An electrical current under solar radiation, solar energy stored in the storage battery by photovoltaic controller, and at the same time the output stable dc to dc load ( Such as street lamps) Use, and transformed into the same as the grid voltage and phase ac output for the use of ac load. Grid and off-grid power generation does not rely on independent power network, so also known as the solar energy generating system independently.